I’m a bit confused. You say you're going to be buying a new
boat, yet Hallberg-Rassy doesn't make a 26' at this point in time. From their website
The HR 26 was built during 1978 - 1985. A total of 469 hulls were built.
So if you were told that this is a new
boat, it is at least 23 years old... which I wouldn't really consider NEW.
This is a used boat,
if it is an HR 26.
The HIN number, which should be located on the starboard side of the transom, as well as someplace inside the boat will tell you what year it is. You can read more about HINs HERE
As such, I would highly recommend you read the Boat Inspection Trip Tips thread
, to help you understand what to look at and for while inspecting the boat to see if it is even worth surveying.
Given your lack of experience, you should probably try and go see the boat with a more experienced friend, who knows a bit more about boats and their construction.
As for osmosis, unless it is visibly blistered, there is no way to tell that you have a problem, without using a moisture meter. The use of a moisture meter is covered in this thread
I'd also highly recommend you read the POST
in my signature, to help you get the most out of your time on sailnet.
Welcome to the asylum, and keep us posted. If you have more questions, please ask away.